PCM1755DBQR

ADCs/DACs - Special Purpose Overview

The PCM1755DBQR is a stereo audio digital-to-analog converter (DAC) from the PCM175x family, manufactured by Texas Instruments. It features a 24-bit resolution and supports sampling rates up to 192 kHz. The device utilizes an enhanced delta-sigma architecture with fourth-order noise shaping and eighth-order amplitude quantization to achieve high dynamic performance and jitter tolerance. Key electrical specifications include a signal-to-noise ratio (SNR) of 106 dB and a total harmonic distortion plus noise (THD+N) of 0.002%. It operates on a single power supply ranging from 4.5 V to 5.5 V and is housed in a 16-pin SSOP package.

ADCs/DACs - Special Purpose Feature Summary

• Enhanced Delta-Sigma Architecture: Uses fourth-order noise shaping and eighth-order amplitude quantization for superior dynamic performance.
• High Audio Performance: Delivers 106 dB SNR and 0.002% THD+N at 24-bit resolution.
• Flexible Control Interface: Supports hardware mode or software control via a three-wire serial interface with register write capabilities.
• Wide Data Format Support: Compatible with industry-standard audio data formats including 16-bit and 24-bit data.

ADCs/DACs - Special Purpose Applications

• Audio DSP systems
• Digital decoders
• Home theater receivers
• Professional audio equipment

ADCs/DACs - Special Purpose Procurement Notes

Verify the specific suffix 'DBQR' against the manufacturer's datasheet to confirm the tape-and-reel packaging configuration. Ensure the input voltage range matches the system design, as the device requires a single supply between 4.5 V and 5.5 V. Confirm RoHS compliance status if required by assembly standards.

ADCs/DACs - Special Purpose Selection Notes

Select the PCM1755DBQR when software programmability is required for gain, mute, and other functions via the serial interface. Compare with PCM1753 and PCM1754 if hardware-only control is sufficient, as those variants may offer different pin compatibility or control mechanisms. Ensure the 192 kHz maximum sampling rate meets the target application's bandwidth requirements.

ADCs/DACs - Special Purpose Part Context

The PCM1755 is part of the PCM175x series, which includes the PCM1753 and PCM1754. These devices share the same core delta-sigma architecture and pinout, differing primarily in their control interfaces. The PCM1755 specifically offers full software control through its serial interface, whereas other members of the family may rely on hardware pins for configuration.

ADCs/DACs - Special Purpose Replacement Considerations

The PCM1753DBQ and PCM1754DBQ are pin-compatible alternatives within the same family. Verify that the control interface differences (software vs. hardware) do not impact the existing circuit design before substitution.